Blog Ergo Sum — Est. 2005

Tag: how-to

It may occur to some to have a bunch of old disks laying in closets and them suddenly having the need to attach them to a running machine to restore some old data. Or you could have the need to boot up it’s System.

How to know which OS X operating system is installed on that drive? Well, all you have to do is a simple:

more /System/Library/CoreServices/SystemVersion.plist

over the Terminal.app. I’m writing this as a reminder for an eventual future need.

Since I’ve got two hard drives on my MacBook Pro, a smaller System SSD one and a large – and slower – mechanical drive as ‘data storage, I wanted to move all the VM created with Virtualbox on the second drive. I gave on my Terminal.app the command before quoted, successfully achieving my attempt…

We currently log 20 terabytes of new data each day, and have around 10 petabytes of data in S3. We use Hadoop to process this data, which enables us to put the most relevant and recent content in front of Pinners through features such as Related Pins, Guided Search, and image processing. It also powers thousands of daily metrics and allows us to put every user-facing change through rigorous experimentation and analysis.

In order to build big data applications quickly, we’ve evolved our single cluster Hadoop infrastructure into a ubiquitous self-serving platform.– making Pinterest

Google and AnswerLab undertook an intensive research study examining how a range of users interacted with a diverse set of mobile sites. The goal, to answer the question: what makes a good mobile site?